Feeding mechanism for haloalkylation reactor for preparing chloroethane

Abstract

The invention belongs to the technical field of preparation of chloroethane, and discloses a feeding mechanism for a haloalkylation reactor for preparing chloroethane, the feeding mechanism comprises a base, a T-shaped platform is welded above the base, raw material steel cylinders located on the two sides of the T-shaped platform are placed above the base, fixing mechanisms are arranged on the outer sides of the raw material steel cylinders, and the T-shaped platform is welded above the T-shaped platform. A feeding mechanism is arranged above the raw material steel cylinder, and a filtering mechanism is arranged above the feeding mechanism. The filter plate can be transversely pulled and replaced, the whole filter does not need to be disassembled, the sealing ring and the inserting groove are subjected to dual sealing, the sealing effect is improved, the inclined surface block is pressed to be completely separated from the clamping groove during disassembling, the filter plate is directly pulled out, the filter plate can be conveniently replaced, the downtime is shortened, and meanwhile the filter plate is convenient to replace. A plurality of filtering plates with filtering holes with different radiuses are arranged for filtering, so that each layer of filtering plate is fully utilized, the filtering effect is improved, and the replacement frequency is reduced.

Description

Technical Field

[0001] This invention belongs to the field of chloroethane preparation technology, specifically a feeding mechanism for a halogenation reactor for chloroethane preparation. Background Technology

[0002] Ethyl chloride, also known as ethyl chloride, is an organic compound with the chemical formula C2H5Cl. It is a colorless gas at room temperature and pressure with an ether-like odor. It is slightly soluble in water and miscible with most organic solvents. It is mainly used as a raw material for tetraethyl lead, ethyl cellulose, etc. It can also be used as a refrigerant, anesthetic, insecticide, smoke agent, ethylating agent, etc. It can also be used as a catalyst for polypropylene and a solvent for phosphorus, sulfur, oils, resins, waxes, etc.

[0003] High-purity ethylene (C2H4) and hydrogen chloride (HCl) gas are dried and mixed in a certain proportion. The mixed gas is passed through a fixed-bed reactor equipped with aluminum chloride (AlCl3) or a supported metal chloride catalyst and reacted at 50-130℃ and 0.2-0.5MPa. After the reaction gas is cooled, the liquid chloroethane is collected by condensation, and the unreacted HCl and ethylene are recycled. The crude product is passed through a distillation column to remove impurities (such as dichloroethane) to obtain chloroethane with a purity ≥99%.

[0004] Traditional feeding mechanisms in halogenation reactors for chloroethane production have the following shortcomings: During operation, these mechanisms often filter the gas to remove particulate impurities, moisture, and oil, preventing catalyst poisoning or equipment blockage. Existing filtration devices mostly use flange connections, requiring multiple bolts for tightening, which is time-consuming. Furthermore, chemical production requires continuous operation, and stopping to disassemble and reassemble filters would lead to a complete shutdown and significant economic losses. Additionally, when filtering the gas, multiple filter plates are typically installed, but the first filter plate to contact the gas filters out most of the impurities, rendering subsequent filter plates ineffective. Over time, this can cause blockage of the initial filter plates, affecting filtration efficiency, and the utilization efficiency of subsequent filter plates is low. Therefore, improvements are needed. Summary of the Invention

[0005] The purpose of this invention is to provide a feeding mechanism for a halogenation reactor for preparing chloroethane, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a feeding mechanism for a halogenation reactor for preparing chloroethane, comprising a base, a T-shaped platform welded above the base, raw material cylinders placed on both sides of the T-shaped platform above the base, a fixing mechanism provided on the outer side of the raw material cylinders, a feeding mechanism provided above the raw material cylinders, and a filtering mechanism provided above the feeding mechanism. The filtering mechanism includes a shell, a rectangular opening on the outer front end of the shell, rectangular plates welded to both sides of the front end of the shell, slots provided on the surface of the rectangular plates, and through-holes provided on the inner side of the slots. The outer side of the shaped plate has a slot. A mounting plate is provided at the rectangular opening 503 on the outer front side of the housing. A connecting plate extending into the rectangular opening is welded to the inner side of the mounting plate. A filter plate movably connected to the rectangular opening is bolted to the inner side of the connecting plate. The radius of the filter holes of the filter plate gradually decreases from bottom to top. Insert plates are welded to both sides of the mounting plate. The front end of the insert plate extends into the slot. A movable groove is opened inside the insert plate. An inclined block is slidably installed inside the movable groove. The inclined block extends into the slot. A telescopic spring is elastically installed between the inner side of the movable groove and the inner side of the inclined block.

[0007] Preferably, the fixing mechanism includes a bottom ring block welded above the base, a connecting block welded above the bottom ring block, an elastic ring glued above the connecting block, an outer ring block welded to the outside of the bottom ring block, a threaded groove formed on the inner side of the outer ring block, a threaded ring threaded onto the inner side of the threaded groove, and a triangular retaining ring welded below the threaded ring.

[0008] Preferably, a knob is welded above the threaded ring, and the knob is located above the outer ring block.

[0009] Preferably, a pressure sensor is bolted to the outside of the housing, and the input end of the pressure sensor extends into the interior of the housing and is located below the rectangular opening.

[0010] Preferably, the movable groove has limit grooves on both sides, and the bottom sides of the inclined block are welded with limit blocks that are slidably connected inside the limit grooves.

[0011] Preferably, a sealing ring is movably fitted onto the outer side of the connecting plate, and the sealing ring is located between the inner side of the mounting plate and the outer side of the housing.

[0012] Preferably, a mixer is bolted to the top of the T-shaped platform, and the input end of the mixer is connected to the top of the housing.

[0013] Preferably, the feeding mechanism includes a pressure reducing valve, the input end of which is connected to the top of the raw material cylinder, the output end of which is threaded with a check valve, the top of which is threaded with a shut-off valve, and the output flange of the shut-off valve is connected to the bottom of the filtering mechanism.

[0014] The beneficial effects of this invention are as follows:

[0015] 1. This invention allows for the horizontal pulling and replacement of the filter plate, eliminating the need to disassemble the entire filter. The double seal of the sealing ring and slot improves the sealing effect. During disassembly, pressing the inclined block completely disengages the filter plate from the slot, allowing it to be pulled out directly, facilitating filter plate replacement and reducing downtime. Furthermore, the use of multiple filter plates with different filtration hole radii ensures full utilization of each filter plate, improving filtration efficiency and reducing replacement frequency.

[0016] 2. This invention achieves "one-click" unlocking through the elastic cooperation of the inclined block and the slot, which is more efficient than traditional bolt fixing; the limiting groove design ensures the stability of the inclined block's movement trajectory, avoiding jamming or displacement and improving operational reliability; the sealing ring and the slot-insert plate fit tightly together, providing double protection against gas leakage, which is superior to a single sealing structure; the filter plate has an increased aperture from top to bottom, allowing large particles to be intercepted preferentially by the lower layer, while the upper filter plate focuses on fine impurities, resulting in higher utilization and extended replacement cycle; the bolt-installed filter plate allows for individual replacement of a single filter plate without the need for complete scrapping, reducing costs.

[0017] 3. This invention uses a rotating knob to compress the triangular retaining ring against the elastic ring, causing it to contract inward and clamp and fix the raw material cylinder. During disassembly, the raw material cylinder can be quickly released by rotating the knob, which facilitates the installation of the raw material cylinder and makes it easy to use.

[0018] 4. This invention uses a pressure sensor to monitor the gas inside the housing in real time and uses pressure difference changes to warn of blockage, thereby judging the usage status of the filter plate. When the filter plate is blocked, the pressure sensor warns to stop the preparation and replace the filter plate. This accurate judgment of the replacement time avoids blind maintenance or delayed replacement and improves the preparation efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the feeding mechanism of the present invention;

[0021] Figure 3 This is a schematic diagram of the filtration mechanism of the present invention;

[0022] Figure 4 This is a schematic diagram of the housing of the present invention;

[0023] Figure 5 This is a schematic diagram of the mounting plate of the present invention;

[0024] Figure 6 This is a schematic diagram of the vertical cross-section of the mounting plate of the present invention;

[0025] Figure 7 for Figure 6 A magnified schematic diagram of the local structure at point A;

[0026] Figure 8 This is a schematic cross-sectional view of the fixing mechanism of the present invention.

[0027] In the diagram: 1. Base; 2. Raw material cylinder; 3. Fixing mechanism; 31. Bottom ring block; 32. Connecting block; 33. Elastic ring; 34. Outer ring block; 35. Threaded groove; 36. Threaded ring; 37. Triangular retaining ring; 38. Knob; 4. Feeding mechanism; 41. Pressure reducing valve; 42. Check valve; 43. Shut-off valve; 5. Filtering mechanism; 501. Housing; 502. Pressure sensor; 503. Rectangular opening; 504. Rectangular plate; 505. Slot; 506. Slot; 507. Mounting plate; 508. Connecting plate; 509. Filter plate; 510. Sealing ring; 511. Insert plate; 512. Movable groove; 513. Inclined block; 514. Telescopic spring; 515. Limiting groove; 516. Limiting block; 6. Mixer; 7. T-shaped platform. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1 to 8As shown, this embodiment of the invention provides a feeding mechanism for a halogenation reactor for preparing chloroethane, including a base 1, a T-shaped platform 7 welded above the base 1, raw material cylinders 2 placed on both sides of the T-shaped platform 7 on the base 1, a fixing mechanism 3 at the bottom of the raw material cylinders 2, a feeding mechanism 4 above the raw material cylinders 2, and a filtering mechanism 5 above the feeding mechanism 4. The filtering mechanism 5 includes a housing 501, a rectangular opening 503 on the outer front end of the housing 501, rectangular plates 504 welded to both sides of the front end of the housing 501, slots 505 on the surface of the rectangular plates 504, and grooves 506 extending through to the outer side of the rectangular plates 504 on the inner side of the slots 505. A mounting plate 507 is provided at the rectangular opening 503 on the outer front end of the housing 501. A connecting plate 508 extending into the rectangular opening 503 is welded to the inner side of the mounting plate 507. A filter plate 509, which is movably connected to the rectangular opening 503, is bolted to the inner side of the connecting plate 508. The radius of the filter holes of the filter plate 509 gradually decreases from bottom to top. A sealing ring 510 is movably sleeved on the outer side of the connecting plate 508. The sealing ring 510 is located between the inner side of the mounting plate 507 and the outer side of the housing 501. Insert plates 511 are welded to both sides of the mounting plate 507. The front end of the insert plate 511 extends into the interior of the slot 505. A movable groove 512 is opened inside the insert plate 511. An inclined block 513 is slidably installed inside the movable groove 512. The inclined block 513 extends into the interior of the slot 506. A telescopic spring 514 is elastically installed between the inner side of the movable groove 512 and the inner side of the inclined block 513.

[0030] like Figure 7 As shown, limit grooves 515 are provided on both sides of the movable groove 512, and limit blocks 516 that are slidably connected inside the limit grooves 515 are welded to the bottom sides of the inclined block 513.

[0031] The inclined block 513 moves into the movable groove 512, causing the limiting block 516 to move into the limiting groove 515, thereby limiting the inclined block 513.

[0032] The filter plate 509 can be pulled out laterally for replacement without disassembling the entire filter. The double seal of the sealing ring 510 and the slot 505 improves the sealing effect. Compared with the feeding mechanism of the traditional halogenation reactor for the preparation of chloroethane, the feeding mechanism of this halogenation reactor for the preparation of chloroethane can be directly pulled out by pressing the inclined block 513 to completely disengage it from the slot 506, which facilitates the replacement of the filter plate 509 and reduces downtime. At the same time, multiple filter plates 509 with different filter hole radii are set for filtration, so that each filter plate 509 is fully utilized, improving the filtration effect and reducing the replacement frequency.

[0033] Compared with conventional removable filter plates, the structure of this application has the following differentiated advantages:

[0034] The inclined block 513 and the slot 506 work together elastically, and the telescopic spring 514 provides pre-tightening force to achieve "one-click" unlocking, which is more efficient than traditional bolt fixing. The limit groove 515 design ensures the stable movement trajectory of the inclined block 513, avoiding jamming or displacement and improving operational reliability. The sealing ring 510 and the outer side of the connecting plate 508 fit tightly with the slot 505-insertion plate 511, doubly preventing gas leakage, which is superior to a single sealing structure. The filter plate 509 has an increased aperture from top to bottom, so that large particles are preferentially intercepted by the lower layer, while the upper filter plate 509 focuses on fine impurities, resulting in higher utilization and extended replacement cycle. The bolt-installed filter plate 509 can replace a single layer without scrapping the whole plate, reducing costs.

[0035] like Figures 1 to 8 As shown, the fixing mechanism 3 includes a bottom ring block 31 welded to the base 1, a connecting block 32 welded above the bottom ring block 31, an elastic ring 33 glued above the connecting block 32, an outer ring block 34 welded to the outside of the bottom ring block 31, a threaded groove 35 opened on the inner side of the outer ring block 34, a threaded ring 36 threaded on the inner side of the threaded groove 35, a triangular retaining ring 37 welded below the threaded ring 36, and a knob 38 welded above the threaded ring 36, the knob 38 being located above the outer ring block 34.

[0036] By rotating the knob 38, the triangular retaining ring 37 is squeezed against the elastic ring 33, causing it to contract inward and clamp and fix the raw material cylinder 2. Compared with the traditional feeding mechanism for the halogenation reactor for preparing chloroethane, this feeding mechanism for the halogenation reactor for preparing chloroethane can quickly complete the fixing and releasing of the raw material cylinder 2 by rotating the knob 38, which facilitates the installation of the raw material cylinder 2 and makes it easy to use.

[0037] like Figures 1 to 4 As shown, a pressure sensor 502 is bolted to the outside of the housing 501. The input end of the pressure sensor 502 extends into the interior of the housing 501 and is located below the rectangular opening 503.

[0038] The pressure sensor 502 monitors the gas inside the housing 501 to determine the condition of the filter plate 509. When the filter plate 509 becomes clogged, the pressure sensor 502 issues a warning to stop the preparation process and replace the filter plate 509. Compared with the traditional feeding mechanism for halogenation reactors used in the preparation of chloroethane, this feeding mechanism for halogenation reactors used in the preparation of chloroethane uses the pressure sensor 502 to determine the condition of the filter plate 509 and can replace it in time after it becomes clogged, thus improving the preparation efficiency.

[0039] A mixer 6 is bolted on the top of the T-shaped platform 7. The input end of the mixer 6 is connected to the top of the housing 501. The feeding mechanism 4 includes a pressure reducing valve 41. The input end of the pressure reducing valve 41 is connected to the top of the raw material cylinder 2. A one-way valve 42 is threaded on the output end of the pressure reducing valve 41. A shut-off valve 43 is threaded on the top of the one-way valve 42. The flange of the output end of the shut-off valve 43 is connected to the bottom of the filter mechanism 5.

[0040] Working principle and usage process:

[0041] First, check the stability of base 1 and T-platform 7 to ensure there is no structural loosening; check that all valves are closed and the pressure gauge is zero; place the ethylene and HCl raw material cylinders 2 vertically on the bottom ring block 31, with the valves of the raw material cylinders 2 facing upwards; connect the outlet of the raw material cylinder 2 to the inlet of the pressure reducing valve 41 of the feeding mechanism 4 through a high-pressure hose, and tighten it with anti-leakage clamps; confirm that the housing 501 of the filter mechanism 5 is aligned with the outlet flange of the shut-off valve 43 of the feeding mechanism 4, and tighten the bolts evenly; connect the inlet of the mixer 6 to the outlet of the filter mechanism 5 through a pipe, and connect the outlet pipe to the reactor; slowly open the valve of the raw material cylinder 2, observe the pressure gauge reading of the pressure reducing valve 41, and adjust it to 0.3-0.5 MPa; open the check valve 42 and the shut-off valve 43 in sequence, and the gas enters the housing 501 of the filter mechanism 5; when the gas passes through the filter plate 509, the particulate matter is intercepted, and the clean gas flows out from the outlet (this... The filter plate in this application is mainly used to filter solid particulate impurities, trace amounts of moisture, or oil from the raw material gases ethylene and hydrogen chloride. In actual production, high-purity raw material gases may contain trace particles such as pipeline corrosion products, catalyst dust, or moisture from gas cylinders or pipelines. The pressure sensor 502 is monitored in real time; if the pressure difference ΔP > 0.1 MPa, the filter plate 509 needs to be replaced. The inclined blocks 513 on both sides of the insert plate 511 are pressed to disengage it from the slot 506. The mounting plate 507 is pulled out horizontally, and the filter plate 509 slides out of the rectangular opening 503 along with the mounting plate 507. The disassembled filter plate 509 is cleaned, and then a new filter plate 509 is inserted into the rectangular opening 503. The sealing ring 510 is deformed under pressure to ensure no leakage between the housing 501 and the filter plate 509. The filtered ethylene and HCl gases enter the mixer 6 and are thoroughly mixed by the internal static spiral blades. The filter mechanism in this application is designed for horizontal pull-out replacement, eliminating the need to disassemble the entire filter or disconnect the pipeline flange connection. The filter plate can be quickly replaced by pressing the inclined block to release it, requiring only a brief pause in feeding on a single route (or completely eliminating the need for a shutdown in a dual-route parallel design), without requiring a full line shutdown. This significantly reduces downtime caused by disassembling traditional flange-type filters, meeting the needs of continuous production.

[0042] Place the ethylene and HCl raw material cylinder 2 vertically on the bottom ring block 31 with the cylinder valve facing upwards; rotate the knob 38 to press down the threaded ring 36, causing the triangular retaining ring 37 to clamp the outer side of the elastic ring 33, causing the elastic ring 33 to contract inwards and clamp the outer wall of the raw material cylinder 2; check whether the elastic ring 33 fits tightly against the cylinder to ensure shock absorption and fixation effect, thereby achieving the effect of quickly fixing the raw material cylinder 2.

[0043] The pressure sensor 502 detects the air pressure inside the housing 501. After the gas enters the housing 501, the pressure sensor 502 detects the air pressure. When the pressure difference exceeds the limit, the preparation is stopped and the filter plate 509 is removed and replaced. This allows for timely monitoring of the use of the filter plate 509 and provides an early warning of filter plate 509 blockage, making it easier for staff to determine when to replace the filter plate 509.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A feeding mechanism for a halogenation reactor for preparing chloroethane, comprising a base (1), characterized in that: A T-shaped platform (7) is welded above the base (1). Raw material cylinders (2) located on both sides of the T-shaped platform (7) are placed above the base (1). A fixing mechanism (3) is provided at the bottom of the raw material cylinders (2). A feeding mechanism (4) is provided above the raw material cylinders (2). A filtering mechanism (5) is provided above the feeding mechanism (4). The filtering mechanism (5) includes a housing (501). A rectangular opening (503) is provided on the outer side of the front end of the housing (501). Rectangular plates (504) are welded on both sides of the front end of the housing (501). A slot (505) is provided on the surface of the rectangular plate (504). A slot (506) is provided on the inner side of the slot (505) that extends to the outer side of the rectangular plate (504). An installation device is provided at the rectangular opening (503) on the outer side of the front end of the housing (501). A mounting plate (507) is provided, and a connecting plate (508) extending into a rectangular opening (503) is welded to the inner side of the mounting plate (507). A filter plate (509) movably connected to the rectangular opening (503) is bolted to the inner side of the connecting plate (508). The radius of the filter holes of the filter plate (509) gradually decreases from bottom to top. Insert plates (511) are welded to both sides of the mounting plate (507). The front end of the insert plate (511) extends into the interior of the slot (505). A movable groove (512) is provided inside the insert plate (511). An inclined block (513) is slidably installed inside the movable groove (512). The inclined block (513) extends into the interior of the slot (506). A telescopic spring (514) is elastically installed between the inner side of the movable groove (512) and the inner side of the inclined block (513).

2. The feeding mechanism for a halocarbonization reactor for preparing chloroethane according to claim 1, characterized in that: The fixing mechanism (3) includes a bottom ring block (31) welded above the base (1), a connecting block (32) welded above the bottom ring block (31), an elastic ring (33) glued above the connecting block (32), an outer ring block (34) welded to the outside of the bottom ring block (31), a threaded groove (35) opened on the inner side of the outer ring block (34), a threaded ring (36) threaded on the inner side of the threaded groove (35), and a triangular retaining ring (37) welded below the threaded ring (36).

3. The feeding mechanism for a halocarbonization reactor for preparing chloroethane according to claim 2, characterized in that: A knob (38) is welded above the threaded ring (36), and the knob (38) is located above the outer ring block (34).

4. The feeding mechanism for a halocarbonization reactor for preparing chloroethane according to claim 1, characterized in that: A pressure sensor (502) is bolted to the outside of the housing (501), and the input end of the pressure sensor (502) extends into the interior of the housing (501) and is located below the rectangular opening (503).

5. The feeding mechanism for a halocarbonization reactor for preparing chloroethane according to claim 1, characterized in that: Limiting grooves (515) are provided on both sides of the movable groove (512), and limiting blocks (516) that are slidably connected inside the limiting grooves (515) are welded to both sides of the bottom of the inclined block (513).

6. The feeding mechanism for a halocarbonization reactor for preparing chloroethane according to claim 1, characterized in that: A sealing ring (510) is movably sleeved on the outer side of the connecting plate (508), and the sealing ring (510) is located between the inner side of the mounting plate (507) and the outer side of the housing (501).

7. The feeding mechanism for a halocarbonization reactor for preparing chloroethane according to claim 1, characterized in that: A mixer (6) is bolted to the top of the T-shaped platform (7), and the input end of the mixer (6) is connected to the top of the housing (501).

8. The feeding mechanism for a halocarbonization reactor for preparing chloroethane according to claim 1, characterized in that: The feeding mechanism (4) includes a pressure reducing valve (41), the input end of which is connected to the top of the raw material cylinder (2), the output end of which is threaded with a one-way valve (42), and the top of the one-way valve (42) is threaded with a shut-off valve (43), the output end flange of which is connected to the bottom of the filter mechanism (5).

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